package chapter04.Example17;
//定义类Animal
class Animal{
    public void shout (){
        System.out.println("喵喵喵....");
    }
}
//Dog类
class Dog extends Animal {
    //重写shout()方法
    public void shout(){
        System.out.println("汪汪汪....");
    }
    public void eat(){
        System.out.println("吃骨头...");
    }
}
//定义测试类
public class Example17 {
    public static void main(String[] args) {
        Animal a1 = new Dog ();
        System.out.println("Animal a1 = new Dog () :"+(a1 instanceof Animal));
        System.out.println("Animal a1 = new Dog () :"+(a1 instanceof Dog));
        Animal a2 = new Dog ();   //实例化Animal对象
        System.out.println("Animal a2 = new Dog () :"+(a2 instanceof Animal));
        System.out.println("Animal a2 = new Dog () :"+(a2 instanceof Dog));
    }
}
